Hi folks,
I am looking for a bit of guidance on a xl-902 I picked up. Any help would be great as I am always learning as I go along.
It appears as though someone before me had pulled the jug and reinstalled the piston backwards (locating pins should face intake right???) The rings have broken when they got hung up on the exhaust port I figure. One of the broken pieces is holding good and well within the ring groove. The other missing piece....? The saw had decent compression and I could get it to fire. I pulled the points assembly plate not realizing it actually housed/supported the crank, bearing and seal. The inside crankcase looks really nice so I would prefer to not split the case. Aside from the generous gouge on the piston there is no other scoring I can detect with my nails on the piston itself. The cylinder is very clean aside from the two nicks right at the bottom and top of the adjacent ports. Everything above the transfers/exhaust port is clean and the chrome shows no Al transfer. I don't have a proper set of calipers to measure the piston diameter but arcing my small digitals across the crown came up with 50.64mm.
I would like to track down some appropriate rings (perhaps from The Greek?) if there is a part number. Is there a preferred direction to pushing out the wrist pin (assuming that is the best way to flip the piston)? Any heat needed? I'll need to somehow get out that broken section of ring without damaging the landings. Tips? I might add this was a cheap pickup so if I can keep and run that piston I would.
I am certain to have a few more Q's so I will leave it at that.
Thanks in advance. I am looking forward to seeing how this will manage the 16" bar the PO was running!
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